Abstract: A fuel injection device (26) for an internal combustion engine (10) has a fuel inlet (40) and a fuel outlet (42). A plunger (58) is operable within a fuel pumping chamber (50) for forcing pressure-amplified fuel to open and pass through an outlet control valve (56) at the outlet. A (“fast-acting”) control valve (64) operates in timed relation to the engine cycle to allow control fluid from an oil rail (34) to force valve (56) closed when fuel is not to be injected and to disallow control fluid from forcing valve (56) closed when fuel is to be injected. A (“slow-acting”) control valve (72) is selectively operable in timed relation to the engine cycle to disallow control fluid from acting on plunger (58) when fuel is not to be injected, but allow control fluid to act on the plunger to force injection when control valve (72) is disallowing control fluid from forcing control valve (56) closed.

Abstract: A pressure regulator is associated with a solenoid-operated valve that is operated by a pulse waveform at a fundamental frequency substantially greater than the frequency response of the valve mechanism. This substantially attenuates solenoid pulsations and applies a predetermined pressure differential across the valve mechanism to accomplish improved flow control accuracy. The invention is especially advantageous for purging fuel vapor to an intake manifold of an internal combustion engine of an automotive vehicle.

Abstract: A fuel supply unit, includes: 1) a fuel pump including; i) a motor section, and ii) a pump section driven by the motor section, the pump section pumping a fuel; and 2) a fuel tank provided with; i) a including; a) an inner section for housing therein one of the following: ?) the motor section, and ?) a first part of the motor section, b) an outer section provided with one of the following: ?) the pump section, with the motor section housed in the inner section, and ?) the pump section and a second part of the motor section, with the first part of the motor section housed in the inner section. The inner section of the motor housing bulkhead is substantially sealably separated from the outer section of the motor housing bulkhead, in such a manner as to bring about an oil tightness.

Abstract: A cold start fuel control system is disclosed for use with an internal combustion engine having at least one combustion chamber, a source of fuel and a primary intake manifold having an inlet and an outlet and fluidly connected between the fuel source and the combustion chamber. The system includes a cold start fuel injector assembly having an inlet and an outlet with the inlet being fluidly connected to the fuel source. An auxiliary intake manifold has an interior chamber which is fluidly connected with each combustion chamber. The outlet from the cold start fuel injector is then fluidly connected to the auxiliary intake manifold so that, upon activation of the cold start fuel injector assembly, a fuel/air is inducted from the cold start fuel injector, through the auxiliary intake manifold and into the engine combustion chambers.

Abstract: A fuel pressure regulator for use with an internal combustion engine includes a housing, a valve assembly in the housing, an elastic diaphragm connecting the valve assembly to the housing, a stop on one of the housing and the support and a spring between the housing and the valve assembly. The housing includes an inlet, an outlet and a longitudinal axis. The valve assembly is intermediate the inlet and the outlet and selectively opens fluid communication between the inlet to the outlet when a fuel pressure at the inlet is at least equal to an over-pressure amount. The valve assembly is displaceable along the longitudinal axis by an opening distance when a fuel pressure at least equal the over-pressure amount acts on the diaphragm so that the diaphragm does not exceed its yield strength. The diaphragm is in fluid communication with the inlet and elastically displaceable along the longitudinal axis up to a maximum distance.

Abstract: The detected values of a common rail pressure that were detected by a pressure sensor are read within crank angle periods ?t which are at least not more than half of a pumping cycle ?T of a supply pump, the values detected within one pumping cycle preceding a reading time (for example, S(1), S(0), . . . S(?4)) are averaged during each of the reading times, and the value thus obtained (for example, Pav(1)) is used as a common rail pressure after averaging processing, which is a representative value or a control value of the actual common rail pressure. The feedback control of common rail pressure is executed by using the values of common rail pressure after averaging processing thus computed by moving averaging. Consequently, the actual common rail pressure is converted into values suitable for control, and the feedback control of common rail pressure is executed with higher accuracy.

Abstract: A fuel delivery system for an internal combustion engine, having a fuel feed pump, which delivers fuel which is at pilot pressure to a high-pressure fuel pump that communicates on the high-pressure side with at least one injection valve, in order to deliver fuel at high pressure to the injection valve or valves. To prevent vapor bubble development in the high-pressure fuel pump, which impairs its pumping capacity and pressure generation, a coolant medium flow can be delivered to the high-pressure fuel pump via at least one coolant conduit, in order to keep the temperature (THDP) of the high-pressure fuel pump below a critical operating temperature (Tk1).

Abstract: The invention relates to a radial piston pump for generating high fuel pressure in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a driveshaft, supported in a housing, that has an eccentrically embodied shaft portion which cooperates with preferably a plurality of pistons capable of reciprocating radially, relative to the driveshaft, in a respective element bore, in order to aspirate fuel and subject it to high pressure in a high-pressure region. In order to increase the efficiency and lengthen the service life, in the outer jacket face (3) of the pistons and/or the inner jacket face of the element bore, a structure in the ?m range is formed.

Abstract: An injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a nozzle valve lift detecting device for detecting nozzle valve lift and providing a nozzle valve element lift feedback signal. Feedback signals are improved and control valve member oscillations are minimized by positioning a valve seat associated with the control valve member a spaced distance from the control volume, positioning a drain orifice such that the nozzle valve element restricts flow through a drain circuit when in an open position and extending the control valve member from the valve seat to the control volume to form an end wall of the control volume.

Abstract: A fuel injection valve for internal combustion engines, having a valve body with longitudinal bore terminating in a valve seat. In the region of the valve seat, at least one injection opening connects the bore with the combustion chamber of the engine. A valve member disposed in the bore cooperates with the valve seat for controlling the at least one injection opening. Between the wall of the bore and the valve member, a pressure chamber is embodied that can be filled with fuel at high pressure. The valve body is surrounded, in the region of the pressure chamber, by a sleeve that has anisotropic strength properties, so that the valve body exhibits less deformation from the pressure in the pressure chamber.

Abstract: A fuel injector with a neck at an upstream end and a downstream end located at a distal end from the upstream end, a fuel channel extending from the upstream end to the downstream end and defining a substantially longitudinal axis, and a check valve located in the fuel channel proximate the upstream end; and a fuel rail with a housing defining an opening having a substantially longitudinal axis passing therethrough, and a one-way flow inhibitor is located in the opening. When removing the fuel injector from the fuel rail, reducing leaks by biasing a plunger of the check valve against a seat of the check valve in the fuel injector and biasing a plunger of the one-way flow inhibitor against a seat of the one-way flow inhibitor in the fuel rail.

Abstract: A recoil starter is disclosed which enables a rotational force to be accumulated in accumulating means with a light pulling force and the accumulated rotational force to start an engine through simple operations. A cam wheel is rotated using a rotational force which has been accumulated in the accumulating means by pulling a recoil rope. Retention means is operable to restrain or permit the rotation of the cam wheel. Release means operates the retention means to restrain the rotation of the cam wheel by pulling a handle attached to the recoil rope, and operates the retention means to permit the rotation of the cam wheel by fixing the handle in a main casing.

Abstract: The present invention relates to a method for operating a fuel metering system (11) of a direct-injection internal combustion engine, having a fuel supply container, at least one prefeed pump a high-pressure pump assembly having at least two high-pressure pumps for pumping fuel out of the low-pressure region into at least one high-pressure reservoir, a control unit for regulating an injection pressure prevailing in the high-pressure reservoir, and having fuel injection valves for injecting fuel out of the high-pressure reservoir into combustion chambers of the engine.

Abstract: A flame arrestor for a fuel pump having housing extending intermediate an upstream end defining an inlet port and a downstream end defining an outlet port coupled in fluid communication with the outlet port along a fluid flow path. The fuel pump further has a motor operably coupled to a pumping element. The arrestor is provided as a body received within the housing intermediate the outlet port and the motor. The arrestor body, which is formed of an open-cell foam material having an average pore size and thickness selected as being both fluid permeable and adapted to prevent an ignition source from propagating therethrough, is disposed in the fluid flow path such that fuel from the pumping element tank may be pumped to the outlet port through the body with the ignition source being prevented from passing into the outlet port.

Abstract: A method for controlling an internal combustion engine (10) is provided. The engine (10) includes an exhaust gas recirculation (EGR) system (18, 20). The method includes determining an air mass flow rate through the intake manifold at a location upstream of the exhaust gas introduction, and determining an engine volumetric efficiency based on an engine speed and an intake manifold air density. An EGR flow rate is determined based on the volumetric efficiency, the intake manifold air density, an engine displacement volume, the engine speed, and the intake manifold air mass flow rate. The engine (10) is controlled based on the EGR flow rate. Preferred techniques for determining engine volumetric efficiency and EGR flow rate are also provided.

Abstract: A method of operating an internal combustion engine of a motor vehicle has the steps of injecting fuel into a combustion chamber in at least two operating types; flowing an air/fuel mixture through a tank ventilation valve and supplying the air/fuel mixture to the combustion chamber; generating an output signal by an integrator, which represents a specific desired fuel rate (fkastes) of the air/fuel mixture flowing through the tank ventilation valve, which is used to take into account respectively a current lambda on the engine; determining a desired fuel proportion (fkates) of the air/fuel mixture flowing through the tank ventilation valve, which represents the desired fuel proportion that should be supplied through the tank ventilation valve; comparing the specific desired fuel rate (fkastes) to the desired fuel proportion (fkates); conveying a comparison result back to the integrator; thereby regulating the specific desired fuel rate (fkastes) to the desired fuel proportion (fkates) of the air/fuel mixture

Abstract: A fuel injection system has a pressure booster unit (1), disposed between a pressure reservoir chamber and a nozzle chamber, which unit has a displaceable piston unit (4) for boosting the pressure of the fuel to be supplied to the nozzle chamber. For controlling the pressure booster unit (1), the piston unit (4) has a transition from a larger to a smaller piston cross section and a differential chamber (2) formed thereby, which is connected to the pressure reservoir chamber via a filling path (13) having a filling valve (10). A reduction in the control quantity during the triggering of the pressure booster unit (1) and the performance of a rapid restoration of the piston unit (4) are attained.

Abstract: A governor for use in an engine provided with an overspeed protection device arranged to trip in the event that engine speed exceeds a predetermined speed. The governor comprises a centrifugal weight mechanism comprising at least one weight coupled to an angularly adjustable metering valve member through a lever member, the metering valve member being operable to control the level of fuelling of the associated engine depending on engine speed. The governor further comprises a damping arrangement associated with the lever member which is arranged to damp oscillatory movement of the lever member, in use, and a prevention arrangement for preventing the overspeed protection device associated with the engine tripping upon engine start up.

Abstract: A fuel injection system having a fuel injection valve in which an injection valve member is urged in an opening direction counter to a closing force by pressure in a pressure chamber which generated by a high-pressure fuel pump driven by a cam. A control valve is actuated by a piezoelectric actuator triggered by an electric control unit by which a communication of the pressure chamber with a relief chamber is controlled. When the control valve is closed, the pressure chamber is disconnected from the relief chamber. The control valve has a control valve member coupled with the actuator via a hydraulic coupler. The actuator, after a charging phase, communicates with an associated voltage meter, and the voltage between the electrical terminals of the actuator is monitored for detecting the function of the control valve.

Abstract: A fuel supply apparatus is provided which works to supply fuel such as a dimethly ether used as an alternative to a typical fuel for an internal combustion engine. The fuel supply apparatus includes a high-pressure pump working to feed the to injectors from a fuel tank through a common rail, a fuel return line, and a compressor working to add to a back pressure higher than a vapor pressure of the fuel to the return line. The addition of the back pressure higher than the vapor pressure of the fuel facilitates liquidizing of the fuel. This results in a decrease in leakage of the fuel, which improves the efficiency of burning of the fuel and ensures the startability and drivability of the engine.